Shower mixer



FIG. 1 is a perspective view of shower mixer, showing the new design;

FIG. 2 is a top view thereof;

FIG. 3 is a front view thereof; and,

FIG. 4 is a left side view thereof.

The broken lines in the drawings form no part of the claimed design. The novelty of the design is in respect of its shape or configuration excluding any novelty in the functional rear portion. 

The ornamental design for shower mixer, as shown and described. 